Brass high Pressure Diecasting
Brass high Pressure Diecasting
Brass high Pressure Diecasting
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Casting Seminar<br />
<strong>Brass</strong> High<br />
<strong>Pressure</strong> <strong>Diecasting</strong><br />
John W. Taylor<br />
Regon Ltd. Station Lane, Witney,<br />
Oxfordshire<br />
<strong>Brass</strong> High <strong>Pressure</strong> <strong>Diecasting</strong><br />
1
Introduction<br />
<br />
<br />
Cost effective manufacturing and<br />
design for the production of High<br />
<strong>Pressure</strong> <strong>Brass</strong> castings.<br />
John Taylor Works Director of<br />
Regon Ltd. (<strong>Brass</strong> High <strong>Pressure</strong><br />
<strong>Diecasting</strong>s) Oxford.<br />
2
Topics of Discussion<br />
<br />
To present an overview of the<br />
various <strong>Brass</strong> Casting techniques.<br />
Outline the advantages and<br />
characteristics of <strong>Brass</strong> High<br />
<strong>Pressure</strong> <strong>Diecasting</strong>.<br />
3
Overview<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
Sand casting<br />
Shell moulding<br />
Gravity diecasting<br />
Investment casting<br />
Centrifugal casting<br />
Continuous casting<br />
Low pressure casting<br />
High pressure diecasting<br />
4
Characteristics of Casting Processes<br />
Characteristics of Casting Processes<br />
Relative position of <strong>Brass</strong> High <strong>Pressure</strong> <strong>Diecasting</strong> in relation to other Casting Processess<br />
Process Batch size Preferred Surface Finish Shapes that can<br />
Weight (kg)<br />
be produced<br />
Sand Casting 1-10,000 Any w eight poor surface finish Complex shapes w ith hollow s<br />
upto 50 the usual.<br />
and projections low est cost for<br />
small production runs.<br />
Shell moulding 50-10,000 0.005-20 good surface finish as above but w ith closer tolerances<br />
Restricted to small and medium castings<br />
Gravity diecasting 100- 10,000 0.01-10 Detailed surface, Complex shapes w ith hollow s<br />
good finish. Joint lines and projections<br />
usual.<br />
Higher tensile properties & hardness than sand castings<br />
Investment casting 1-10,000 0.002-50 Intricate shape and good Almost no restriction<br />
surface finish. No joint on shape. Dimensional accuracy <strong>high</strong> but an expensive process<br />
lines.<br />
Centrifugal casting 1-10,000 0.005-1000 good surface Used for producing discs or rings.<br />
finish.<br />
Thick w alled cylinders may also be cast.<br />
Continuous casting 1-10,000 Diameter limited good surface finish Rods, section,tubes<br />
and above 10-150mm and profiles.<br />
Low pressure casting 50-5,000 1.5-50 good surface finish Intricate internal cavities abilty to use sand cores to form shapes.<br />
<strong>high</strong>er cycle times.<br />
High pressure 500-10,000 0.005-5 Intricate surface finish Complex shapes but w ith<br />
and above minimal joint lines. thinner w all sections and<br />
detail.<br />
Multi-cavity and <strong>high</strong> production rates.<br />
Reduced need for finishing operations and machining.
<strong>Brass</strong> High <strong>Pressure</strong><br />
<strong>Diecasting</strong><br />
<br />
<br />
<br />
Process of High <strong>Pressure</strong><br />
<strong>Diecasting</strong><br />
Finishing<br />
Recycling<br />
6
Cold Chamber <strong>Diecasting</strong> Machine
Summary<br />
<strong>Brass</strong> High <strong>Pressure</strong> <strong>Diecasting</strong>s give<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
High production rates<br />
Repeatability-close dimensional control<br />
Efficient use of Material-less waste<br />
Recyclable material<br />
More detail<br />
Good surface finish<br />
Fettling and Filing Eliminated<br />
Wide selection of <strong>Brass</strong> materials used<br />
Irregular Shapes<br />
Thinner wall sections<br />
8
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